CONWAY, Ark. (AP) - Arkansas State Police have gotten a description of a vehicle that may be linked with the killing a motorist on Interstate 40 in Conway.

The agency said Wednesday that investigators are looking for a white four-door Nissan sedan that may have been in the area when 31-year-old Jose Martinez was killed the morning of Feb. 10.

State police say they hope a witness comes forward with information. The car was seen in the vicinity of the Morgan interchange with I-40 at 4:45 a.m. on Feb. 10, and along the westbound lanes in Conway as late as 5:15 a.m.

A trooper found Martinez in his black Nissan Frontier pickup after a dispatcher got a call about a drunken or crashed motorist.